diff --git a/EIPS/eip-2266.md b/EIPS/eip-2266.md
index 46af7bfc..8a2a37be 100644
--- a/EIPS/eip-2266.md
+++ b/EIPS/eip-2266.md
@@ -3,7 +3,7 @@ eip: 2266
 title: Atomic Swap-based American Call Option Contract Standard
 author: Runchao Han <runchao.han@monash.edu>, Haoyu Lin <chris.haoyul@gmail.com>, Jiangshan Yu <jiangshan.yu@monash.edu>
 discussions-to: https://github.com/ethereum/EIPs/issues/2266
-status: Draft
+status: Last Call
 type: Standards Track
 category: ERC
 created: 2019-08-17
@@ -224,6 +224,12 @@ event PremiumRefunded(uint256 refundTimestamp, bytes32 secretHash, address refun
 + Premium is refundable for the initiator only if the initiator initiates but the participant does not participate in the swap at all.
 
 
+## Security Considerations
+
++ The `initiateTimestamp` should cover the whole swap process.
++ The participant should never participate before the premium has been deposited.
+
+
 ## Backwards Compatibility
 
 This proposal is fully backward compatible. Functionalities of existing standards will not be affected by this proposal, as it only provides additional features to them.